Channel model and modulation schemes for visible light communications

Lee, Kwonhyung; Park, Hyuncheol

doi:10.1109/mwscas.2011.6026479

Cited by 35 publications

(22 citation statements)

References 5 publications

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“…There are many types of the modulation that we use in the wireless communication. On-Off Keying (OOK) [1,4,5,6], Colour Shifted Keying (CSK) [1,7,8,9,10], Pulse Position Modulation (PPM) [1,3,4,11], Pulse Width Modulation (PWM) [12], and Orthogonal Frequency Division Multiplexing (OFDM) [1,2,13,14] are some examples of the frequently used modulation in the visible light communication.…”

Section: Introductionmentioning

confidence: 99%

Modulation performance for visible light communications

Shinwasusin

Charoenlarpnopparut

Suksompong

et al. 2015

2015 6th International Conference of Information and Communication Technology for Embedded Systems (IC-ICTES)

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LEDs can transport the signal or data via visible light instead of radio wave in some place that the radio wave will effect the human or damage the component. Therefore, this paper presents about the digital modulation for improving not only data rate and bit error rate but also flickering, colour rendering, dimming range, luminous efficacy rate that are required to keep in a satisfactory level. There are many types of the modulation that have different property. Therefore, the literature review is discussed and shows the comparison of Return-to-zero On-Off Keying (RZ-OOK), Non-Return-to-zero On-Off Keying (NRZ-OOK), and Binary Phase Shifted Keying (BPSK) in the form of analytical and simulation by the graph of BER versus SNR and also the comparative table of On-Off Keying (OOK), Colour Shifted Keying (CSK), Pulse Position Modulation (PPM), Pulse Width Modulation (PWM), and Orthogonal Frequency Division Multiplexing (OFDM).

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Section: Introductionmentioning

confidence: 99%

Modulation performance for visible light communications

Shinwasusin

Charoenlarpnopparut

Suksompong

et al. 2015

2015 6th International Conference of Information and Communication Technology for Embedded Systems (IC-ICTES)

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“…In particular, multipath propagation imposed by reflections results in spreading of the received signal, and the power delay profile (PDP) can be used to analyze the effect of multipath dispersion between transceivers. One of the widely used VLC channels was proposed in [37], [38] by Lee et al, where the multipath PDP is given as…”

Section: Vlc Linksmentioning

confidence: 99%

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Zhang

Hanzo

2018

IEEE Commun. Surv. Tutorials

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Abstract-In order to counteract the explosive escalation of wireless tele-traffic, the communication spectrum has been gradually expanded from the conventional radio frequency (RF) band to the optical wireless (OW) domain. By integrating the classic RF band relying on diverse radio techniques and optical bands, the next-generation heterogeneous networks (HetNets) are expected to offer a potential solution for supporting the ever-increasing wireless tele-traffic. Owing to its abundant unlicensed spectral resources, visible light communications (VLC) combined with advanced illumination constitute a competent candidate for complementing the existing RF networks. Although the advantages of VLC are multi-fold, some challenges arise when incorporating VLC into the classic RF HetNet environments, which may require new system architectures. The user-centric (UC) design principle for VLC environments constitutes a novel and competitive design paradigm for the super dense multi-tier cell combinations of HetNets. The UC concept may be expected to become one of the disruptive techniques to be used in the forthcoming fifthgeneration era. This paper provides a comprehensive survey of visible-light-aided OW systems with special emphasis on the design and optimization of VLC networks, where the radically new UC design philosophy is reviewed. Finally, design guidelines are provided for VLC systems.

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“…However, the denser reuse of spectral resources will potentially impose an increased amount of interference [1]. In the light of these problems, Visible Light Communications (VLC) [2]- [6] has emerged as an appealing access method to provide extra licensefree bandwidth, as a compliment to WiFi, femtocells, ultra wideband (UWB) and mm-wave communications in order to support indoor communications. Specifically, VLC supports high-rate downlink communications, in addition to its primary function of illumination in indoor environments.…”

Section: A Background Of Visible Light Communicationmentioning

confidence: 99%

Hierarchical Colour-Shift-Keying Aided Layered Video Streaming for the Visible Light Downlink

et al. 2016

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Colour-shift keying (CSK) constitutes an important modulation scheme conceived for the visible light communications (VLC). The signal constellation of CSK relies on three different-colour light-sources invoked for information transmission. The CSK constellation has been optimized for minimizing the bit error rate, but no effort has been invested in investigating the feasibility of CSK aided unequal error protection (UEP) schemes conceived for video sources. Hence in this treatise, we conceive a hierarchical CSK (HCSK) modulation scheme based on the traditional CSK, which is capable of generating interdependent layers of signals having different error probability, which can be readily reconfigured by changing its parameters. Furthermore, we conceived a HCSK design example for transmitting scalable video sources with the aid of a recursive systematic convolutional (RSC) code. An optimisation method is conceived for enhancing the UEP and for improving the quality of the received video. Our simulation results show that the proposed optimized-UEP 16-HCSK-RSC system outperforms the traditional EEP scheme by about 1.7 dB of optical SNR at a peak signal-to-noise ratio (PSNR) of 37 dB, whilst optical SNR savings of up to 6.5 dB are attained at a lower PSNR of 36 dB.

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Channel model and modulation schemes for visible light communications

Cited by 35 publications

References 5 publications

Modulation performance for visible light communications

Modulation performance for visible light communications

Optimization of Visible-Light Optical Wireless Systems: Network-Centric Versus User-Centric Designs

Hierarchical Colour-Shift-Keying Aided Layered Video Streaming for the Visible Light Downlink

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